add: explanation to script

lib/rules/best-practises/explicit-types.js

@@ -182,13 +182,16 @@ class ExplicitTypesChecker extends BaseChecker {
   fixStatement(node, errorVar) {
     const range = this.findTypeRanges(node, errorVar)
 
-    // previous script searches all json and if two unit are in the same line
+    // previous script searches all json and if two uint/uint256/ufixed/etc are in the same line
     // it will return two set of range values
+    // this is to remove the first one if it's already been corrected
+    // and to push it to the array to store the corrected ones 
     if (alreadyFixedRanges.includes(range[0])) {
       range.shift()
     }
     alreadyFixedRanges.push(range[0])
 
+    // only check the first range returned when findTypesRanges return two or more
     const charsToReplace = errorVar.length - 1
     range[0][1] = range[0][0] + charsToReplace